]]>
LearnNext
Get a free home demo of LearnNext

Available for CBSE, ICSE and State Board syllabus.
Call our LearnNext Expert on 1800 419 1234 (tollfree)
OR submit details below for a call back

clear

How do Plants Absorb Water?

5,679 Views
Have a doubt? Clear it now.
live_help Have a doubt, Ask our Expert Ask Now
format_list_bulleted Take this Lesson Test Start Test

How do Plants Absorb Water? - Lesson Summary

Root hairs in plants absorb both water and minerals from the soil through diffusion. After the water is absorbed, it moves deeper into the root layers by either of the two pathways – apoplast or symplast.
 
In the apoplastic movement, water travels through intercellular spaces and permeable cell walls and is interrupted by waxy, suberised casparian strips in the root endodermis.
 
In the symplastic movement, water travels through the cell cytoplasm and intercellular movement is through the plasmodesmata.    Water movement takes down the potential gradient. As water enters the cells through the not-so-permeable cell membrane in the symplastic pathway, water movement is slower. The inner boundary of the cortex, that is, the endodermis, is impervious to water due to the presence of casparian strips.  As water molecules are unable to penetrate this layer, they move to the wall regions that are not lined with casparian strips and reach the xylem cells. Therefore, it is the only pathway that allows water and solutes to reach the vascular tissues.

Water moves freely once it is inside the xylem and enters the xylem vessels and tracheids. These xylem elements are non-living and therefore, become a part of the apoplast movement, which occurs in the non-living parts of the root.
 
Some plants such as pinus have additional structures called mycorrhiza associated with their roots, to help in the absorption of water and minerals.

Comments(0)

Feel the LearnNext Experience on App

Download app, watch sample animated video lessons and get a free trial.

Desktop Download Now
Tablet
Mobile
Try LearnNext at home

Get a free home demo. Book an appointment now!

GET DEMO AT HOME